How Can I write Extension Methods to Simplify a LINQ to Entities Query?

Question

This code is just a random example:

var query = _context.Subscriptions
    .Where(s =>
        s.Archived == false &&
        s.Deleted == false &&
        s.FeatureFlag.Archived == false &&
        s.FeatureFlag.Deleted == false &&
        (s.Subscriber.ToUpper() == memberUrl ||
            s.Subscriber.ToUpper() == tenant ||
            userRegions.Contains(s.Subscriber.ToUpper())))
    .Select(s => /* ... */);

I'd like to refactor this to make the code more readable (and DRYer), by adding some extension methods to my Models; something like:

var query = _context.Subscriptions
    .Where(subscription =>
        subscription.IsActive() && 
        subscription.ApplysToAnyOf(memberUrl, tenant, userRegions))
    .Select(s =>  /* ... */);

but since this is LINQ to Entities, it doesn't know how to parse my refactoring, and I'm not fluent enough with LINQ to understand the right way to do it.